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1/*
2 * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
3 * Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved.
4 *
5 * This copyrighted material is made available to anyone wishing to use,
6 * modify, copy, or redistribute it subject to the terms and conditions
7 * of the GNU General Public License version 2.
8 */
9
10#include <linux/sched.h>
11#include <linux/slab.h>
12#include <linux/spinlock.h>
13#include <linux/completion.h>
14#include <linux/buffer_head.h>
15#include <linux/gfs2_ondisk.h>
16#include <linux/bio.h>
17#include <linux/fs.h>
18
19#include "gfs2.h"
20#include "incore.h"
21#include "inode.h"
22#include "glock.h"
23#include "log.h"
24#include "lops.h"
25#include "meta_io.h"
26#include "recovery.h"
27#include "rgrp.h"
28#include "trans.h"
29#include "util.h"
30#include "trace_gfs2.h"
31
32/**
33 * gfs2_pin - Pin a buffer in memory
34 * @sdp: The superblock
35 * @bh: The buffer to be pinned
36 *
37 * The log lock must be held when calling this function
38 */
39static void gfs2_pin(struct gfs2_sbd *sdp, struct buffer_head *bh)
40{
41 struct gfs2_bufdata *bd;
42
43 BUG_ON(!current->journal_info);
44
45 clear_buffer_dirty(bh);
46 if (test_set_buffer_pinned(bh))
47 gfs2_assert_withdraw(sdp, 0);
48 if (!buffer_uptodate(bh))
49 gfs2_io_error_bh(sdp, bh);
50 bd = bh->b_private;
51 /* If this buffer is in the AIL and it has already been written
52 * to in-place disk block, remove it from the AIL.
53 */
54 spin_lock(&sdp->sd_ail_lock);
55 if (bd->bd_ail)
56 list_move(&bd->bd_ail_st_list, &bd->bd_ail->ai_ail2_list);
57 spin_unlock(&sdp->sd_ail_lock);
58 get_bh(bh);
59 atomic_inc(&sdp->sd_log_pinned);
60 trace_gfs2_pin(bd, 1);
61}
62
63/**
64 * gfs2_unpin - Unpin a buffer
65 * @sdp: the filesystem the buffer belongs to
66 * @bh: The buffer to unpin
67 * @ai:
68 * @flags: The inode dirty flags
69 *
70 */
71
72static void gfs2_unpin(struct gfs2_sbd *sdp, struct buffer_head *bh,
73 struct gfs2_ail *ai)
74{
75 struct gfs2_bufdata *bd = bh->b_private;
76
77 BUG_ON(!buffer_uptodate(bh));
78 BUG_ON(!buffer_pinned(bh));
79
80 lock_buffer(bh);
81 mark_buffer_dirty(bh);
82 clear_buffer_pinned(bh);
83
84 spin_lock(&sdp->sd_ail_lock);
85 if (bd->bd_ail) {
86 list_del(&bd->bd_ail_st_list);
87 brelse(bh);
88 } else {
89 struct gfs2_glock *gl = bd->bd_gl;
90 list_add(&bd->bd_ail_gl_list, &gl->gl_ail_list);
91 atomic_inc(&gl->gl_ail_count);
92 }
93 bd->bd_ail = ai;
94 list_add(&bd->bd_ail_st_list, &ai->ai_ail1_list);
95 spin_unlock(&sdp->sd_ail_lock);
96
97 clear_bit(GLF_LFLUSH, &bd->bd_gl->gl_flags);
98 trace_gfs2_pin(bd, 0);
99 unlock_buffer(bh);
100 atomic_dec(&sdp->sd_log_pinned);
101}
102
103
104static inline struct gfs2_log_descriptor *bh_log_desc(struct buffer_head *bh)
105{
106 return (struct gfs2_log_descriptor *)bh->b_data;
107}
108
109static inline __be64 *bh_log_ptr(struct buffer_head *bh)
110{
111 struct gfs2_log_descriptor *ld = bh_log_desc(bh);
112 return (__force __be64 *)(ld + 1);
113}
114
115static inline __be64 *bh_ptr_end(struct buffer_head *bh)
116{
117 return (__force __be64 *)(bh->b_data + bh->b_size);
118}
119
120
121static struct buffer_head *gfs2_get_log_desc(struct gfs2_sbd *sdp, u32 ld_type)
122{
123 struct buffer_head *bh = gfs2_log_get_buf(sdp);
124 struct gfs2_log_descriptor *ld = bh_log_desc(bh);
125 ld->ld_header.mh_magic = cpu_to_be32(GFS2_MAGIC);
126 ld->ld_header.mh_type = cpu_to_be32(GFS2_METATYPE_LD);
127 ld->ld_header.mh_format = cpu_to_be32(GFS2_FORMAT_LD);
128 ld->ld_type = cpu_to_be32(ld_type);
129 ld->ld_length = 0;
130 ld->ld_data1 = 0;
131 ld->ld_data2 = 0;
132 memset(ld->ld_reserved, 0, sizeof(ld->ld_reserved));
133 return bh;
134}
135
136static void buf_lo_add(struct gfs2_sbd *sdp, struct gfs2_log_element *le)
137{
138 struct gfs2_bufdata *bd = container_of(le, struct gfs2_bufdata, bd_le);
139 struct gfs2_meta_header *mh;
140 struct gfs2_trans *tr;
141
142 lock_buffer(bd->bd_bh);
143 gfs2_log_lock(sdp);
144 if (!list_empty(&bd->bd_list_tr))
145 goto out;
146 tr = current->journal_info;
147 tr->tr_touched = 1;
148 tr->tr_num_buf++;
149 list_add(&bd->bd_list_tr, &tr->tr_list_buf);
150 if (!list_empty(&le->le_list))
151 goto out;
152 set_bit(GLF_LFLUSH, &bd->bd_gl->gl_flags);
153 set_bit(GLF_DIRTY, &bd->bd_gl->gl_flags);
154 gfs2_meta_check(sdp, bd->bd_bh);
155 gfs2_pin(sdp, bd->bd_bh);
156 mh = (struct gfs2_meta_header *)bd->bd_bh->b_data;
157 mh->__pad0 = cpu_to_be64(0);
158 mh->mh_jid = cpu_to_be32(sdp->sd_jdesc->jd_jid);
159 sdp->sd_log_num_buf++;
160 list_add(&le->le_list, &sdp->sd_log_le_buf);
161 tr->tr_num_buf_new++;
162out:
163 gfs2_log_unlock(sdp);
164 unlock_buffer(bd->bd_bh);
165}
166
167static void buf_lo_before_commit(struct gfs2_sbd *sdp)
168{
169 struct buffer_head *bh;
170 struct gfs2_log_descriptor *ld;
171 struct gfs2_bufdata *bd1 = NULL, *bd2;
172 unsigned int total;
173 unsigned int limit;
174 unsigned int num;
175 unsigned n;
176 __be64 *ptr;
177
178 limit = buf_limit(sdp);
179 /* for 4k blocks, limit = 503 */
180
181 gfs2_log_lock(sdp);
182 total = sdp->sd_log_num_buf;
183 bd1 = bd2 = list_prepare_entry(bd1, &sdp->sd_log_le_buf, bd_le.le_list);
184 while(total) {
185 num = total;
186 if (total > limit)
187 num = limit;
188 gfs2_log_unlock(sdp);
189 bh = gfs2_get_log_desc(sdp, GFS2_LOG_DESC_METADATA);
190 gfs2_log_lock(sdp);
191 ld = bh_log_desc(bh);
192 ptr = bh_log_ptr(bh);
193 ld->ld_length = cpu_to_be32(num + 1);
194 ld->ld_data1 = cpu_to_be32(num);
195
196 n = 0;
197 list_for_each_entry_continue(bd1, &sdp->sd_log_le_buf,
198 bd_le.le_list) {
199 *ptr++ = cpu_to_be64(bd1->bd_bh->b_blocknr);
200 if (++n >= num)
201 break;
202 }
203
204 gfs2_log_unlock(sdp);
205 submit_bh(WRITE_SYNC, bh);
206 gfs2_log_lock(sdp);
207
208 n = 0;
209 list_for_each_entry_continue(bd2, &sdp->sd_log_le_buf,
210 bd_le.le_list) {
211 get_bh(bd2->bd_bh);
212 gfs2_log_unlock(sdp);
213 lock_buffer(bd2->bd_bh);
214 bh = gfs2_log_fake_buf(sdp, bd2->bd_bh);
215 submit_bh(WRITE_SYNC, bh);
216 gfs2_log_lock(sdp);
217 if (++n >= num)
218 break;
219 }
220
221 BUG_ON(total < num);
222 total -= num;
223 }
224 gfs2_log_unlock(sdp);
225}
226
227static void buf_lo_after_commit(struct gfs2_sbd *sdp, struct gfs2_ail *ai)
228{
229 struct list_head *head = &sdp->sd_log_le_buf;
230 struct gfs2_bufdata *bd;
231
232 while (!list_empty(head)) {
233 bd = list_entry(head->next, struct gfs2_bufdata, bd_le.le_list);
234 list_del_init(&bd->bd_le.le_list);
235 sdp->sd_log_num_buf--;
236
237 gfs2_unpin(sdp, bd->bd_bh, ai);
238 }
239 gfs2_assert_warn(sdp, !sdp->sd_log_num_buf);
240}
241
242static void buf_lo_before_scan(struct gfs2_jdesc *jd,
243 struct gfs2_log_header_host *head, int pass)
244{
245 struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode);
246
247 if (pass != 0)
248 return;
249
250 sdp->sd_found_blocks = 0;
251 sdp->sd_replayed_blocks = 0;
252}
253
254static int buf_lo_scan_elements(struct gfs2_jdesc *jd, unsigned int start,
255 struct gfs2_log_descriptor *ld, __be64 *ptr,
256 int pass)
257{
258 struct gfs2_inode *ip = GFS2_I(jd->jd_inode);
259 struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode);
260 struct gfs2_glock *gl = ip->i_gl;
261 unsigned int blks = be32_to_cpu(ld->ld_data1);
262 struct buffer_head *bh_log, *bh_ip;
263 u64 blkno;
264 int error = 0;
265
266 if (pass != 1 || be32_to_cpu(ld->ld_type) != GFS2_LOG_DESC_METADATA)
267 return 0;
268
269 gfs2_replay_incr_blk(sdp, &start);
270
271 for (; blks; gfs2_replay_incr_blk(sdp, &start), blks--) {
272 blkno = be64_to_cpu(*ptr++);
273
274 sdp->sd_found_blocks++;
275
276 if (gfs2_revoke_check(sdp, blkno, start))
277 continue;
278
279 error = gfs2_replay_read_block(jd, start, &bh_log);
280 if (error)
281 return error;
282
283 bh_ip = gfs2_meta_new(gl, blkno);
284 memcpy(bh_ip->b_data, bh_log->b_data, bh_log->b_size);
285
286 if (gfs2_meta_check(sdp, bh_ip))
287 error = -EIO;
288 else
289 mark_buffer_dirty(bh_ip);
290
291 brelse(bh_log);
292 brelse(bh_ip);
293
294 if (error)
295 break;
296
297 sdp->sd_replayed_blocks++;
298 }
299
300 return error;
301}
302
303static void buf_lo_after_scan(struct gfs2_jdesc *jd, int error, int pass)
304{
305 struct gfs2_inode *ip = GFS2_I(jd->jd_inode);
306 struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode);
307
308 if (error) {
309 gfs2_meta_sync(ip->i_gl);
310 return;
311 }
312 if (pass != 1)
313 return;
314
315 gfs2_meta_sync(ip->i_gl);
316
317 fs_info(sdp, "jid=%u: Replayed %u of %u blocks\n",
318 jd->jd_jid, sdp->sd_replayed_blocks, sdp->sd_found_blocks);
319}
320
321static void revoke_lo_add(struct gfs2_sbd *sdp, struct gfs2_log_element *le)
322{
323 struct gfs2_bufdata *bd = container_of(le, struct gfs2_bufdata, bd_le);
324 struct gfs2_glock *gl = bd->bd_gl;
325 struct gfs2_trans *tr;
326
327 tr = current->journal_info;
328 tr->tr_touched = 1;
329 tr->tr_num_revoke++;
330 sdp->sd_log_num_revoke++;
331 atomic_inc(&gl->gl_revokes);
332 set_bit(GLF_LFLUSH, &gl->gl_flags);
333 list_add(&le->le_list, &sdp->sd_log_le_revoke);
334}
335
336static void revoke_lo_before_commit(struct gfs2_sbd *sdp)
337{
338 struct gfs2_log_descriptor *ld;
339 struct gfs2_meta_header *mh;
340 struct buffer_head *bh;
341 unsigned int offset;
342 struct list_head *head = &sdp->sd_log_le_revoke;
343 struct gfs2_bufdata *bd;
344
345 if (!sdp->sd_log_num_revoke)
346 return;
347
348 bh = gfs2_get_log_desc(sdp, GFS2_LOG_DESC_REVOKE);
349 ld = bh_log_desc(bh);
350 ld->ld_length = cpu_to_be32(gfs2_struct2blk(sdp, sdp->sd_log_num_revoke,
351 sizeof(u64)));
352 ld->ld_data1 = cpu_to_be32(sdp->sd_log_num_revoke);
353 offset = sizeof(struct gfs2_log_descriptor);
354
355 list_for_each_entry(bd, head, bd_le.le_list) {
356 sdp->sd_log_num_revoke--;
357
358 if (offset + sizeof(u64) > sdp->sd_sb.sb_bsize) {
359 submit_bh(WRITE_SYNC, bh);
360
361 bh = gfs2_log_get_buf(sdp);
362 mh = (struct gfs2_meta_header *)bh->b_data;
363 mh->mh_magic = cpu_to_be32(GFS2_MAGIC);
364 mh->mh_type = cpu_to_be32(GFS2_METATYPE_LB);
365 mh->mh_format = cpu_to_be32(GFS2_FORMAT_LB);
366 offset = sizeof(struct gfs2_meta_header);
367 }
368
369 *(__be64 *)(bh->b_data + offset) = cpu_to_be64(bd->bd_blkno);
370 offset += sizeof(u64);
371 }
372 gfs2_assert_withdraw(sdp, !sdp->sd_log_num_revoke);
373
374 submit_bh(WRITE_SYNC, bh);
375}
376
377static void revoke_lo_after_commit(struct gfs2_sbd *sdp, struct gfs2_ail *ai)
378{
379 struct list_head *head = &sdp->sd_log_le_revoke;
380 struct gfs2_bufdata *bd;
381 struct gfs2_glock *gl;
382
383 while (!list_empty(head)) {
384 bd = list_entry(head->next, struct gfs2_bufdata, bd_le.le_list);
385 list_del_init(&bd->bd_le.le_list);
386 gl = bd->bd_gl;
387 atomic_dec(&gl->gl_revokes);
388 clear_bit(GLF_LFLUSH, &gl->gl_flags);
389 kmem_cache_free(gfs2_bufdata_cachep, bd);
390 }
391}
392
393static void revoke_lo_before_scan(struct gfs2_jdesc *jd,
394 struct gfs2_log_header_host *head, int pass)
395{
396 struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode);
397
398 if (pass != 0)
399 return;
400
401 sdp->sd_found_revokes = 0;
402 sdp->sd_replay_tail = head->lh_tail;
403}
404
405static int revoke_lo_scan_elements(struct gfs2_jdesc *jd, unsigned int start,
406 struct gfs2_log_descriptor *ld, __be64 *ptr,
407 int pass)
408{
409 struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode);
410 unsigned int blks = be32_to_cpu(ld->ld_length);
411 unsigned int revokes = be32_to_cpu(ld->ld_data1);
412 struct buffer_head *bh;
413 unsigned int offset;
414 u64 blkno;
415 int first = 1;
416 int error;
417
418 if (pass != 0 || be32_to_cpu(ld->ld_type) != GFS2_LOG_DESC_REVOKE)
419 return 0;
420
421 offset = sizeof(struct gfs2_log_descriptor);
422
423 for (; blks; gfs2_replay_incr_blk(sdp, &start), blks--) {
424 error = gfs2_replay_read_block(jd, start, &bh);
425 if (error)
426 return error;
427
428 if (!first)
429 gfs2_metatype_check(sdp, bh, GFS2_METATYPE_LB);
430
431 while (offset + sizeof(u64) <= sdp->sd_sb.sb_bsize) {
432 blkno = be64_to_cpu(*(__be64 *)(bh->b_data + offset));
433
434 error = gfs2_revoke_add(sdp, blkno, start);
435 if (error < 0) {
436 brelse(bh);
437 return error;
438 }
439 else if (error)
440 sdp->sd_found_revokes++;
441
442 if (!--revokes)
443 break;
444 offset += sizeof(u64);
445 }
446
447 brelse(bh);
448 offset = sizeof(struct gfs2_meta_header);
449 first = 0;
450 }
451
452 return 0;
453}
454
455static void revoke_lo_after_scan(struct gfs2_jdesc *jd, int error, int pass)
456{
457 struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode);
458
459 if (error) {
460 gfs2_revoke_clean(sdp);
461 return;
462 }
463 if (pass != 1)
464 return;
465
466 fs_info(sdp, "jid=%u: Found %u revoke tags\n",
467 jd->jd_jid, sdp->sd_found_revokes);
468
469 gfs2_revoke_clean(sdp);
470}
471
472static void rg_lo_add(struct gfs2_sbd *sdp, struct gfs2_log_element *le)
473{
474 struct gfs2_rgrpd *rgd;
475 struct gfs2_trans *tr = current->journal_info;
476
477 tr->tr_touched = 1;
478
479 rgd = container_of(le, struct gfs2_rgrpd, rd_le);
480
481 gfs2_log_lock(sdp);
482 if (!list_empty(&le->le_list)){
483 gfs2_log_unlock(sdp);
484 return;
485 }
486 gfs2_rgrp_bh_hold(rgd);
487 sdp->sd_log_num_rg++;
488 list_add(&le->le_list, &sdp->sd_log_le_rg);
489 gfs2_log_unlock(sdp);
490}
491
492static void rg_lo_after_commit(struct gfs2_sbd *sdp, struct gfs2_ail *ai)
493{
494 struct list_head *head = &sdp->sd_log_le_rg;
495 struct gfs2_rgrpd *rgd;
496
497 while (!list_empty(head)) {
498 rgd = list_entry(head->next, struct gfs2_rgrpd, rd_le.le_list);
499 list_del_init(&rgd->rd_le.le_list);
500 sdp->sd_log_num_rg--;
501
502 gfs2_rgrp_repolish_clones(rgd);
503 gfs2_rgrp_bh_put(rgd);
504 }
505 gfs2_assert_warn(sdp, !sdp->sd_log_num_rg);
506}
507
508/**
509 * databuf_lo_add - Add a databuf to the transaction.
510 *
511 * This is used in two distinct cases:
512 * i) In ordered write mode
513 * We put the data buffer on a list so that we can ensure that its
514 * synced to disk at the right time
515 * ii) In journaled data mode
516 * We need to journal the data block in the same way as metadata in
517 * the functions above. The difference is that here we have a tag
518 * which is two __be64's being the block number (as per meta data)
519 * and a flag which says whether the data block needs escaping or
520 * not. This means we need a new log entry for each 251 or so data
521 * blocks, which isn't an enormous overhead but twice as much as
522 * for normal metadata blocks.
523 */
524static void databuf_lo_add(struct gfs2_sbd *sdp, struct gfs2_log_element *le)
525{
526 struct gfs2_bufdata *bd = container_of(le, struct gfs2_bufdata, bd_le);
527 struct gfs2_trans *tr = current->journal_info;
528 struct address_space *mapping = bd->bd_bh->b_page->mapping;
529 struct gfs2_inode *ip = GFS2_I(mapping->host);
530
531 lock_buffer(bd->bd_bh);
532 gfs2_log_lock(sdp);
533 if (tr) {
534 if (!list_empty(&bd->bd_list_tr))
535 goto out;
536 tr->tr_touched = 1;
537 if (gfs2_is_jdata(ip)) {
538 tr->tr_num_buf++;
539 list_add(&bd->bd_list_tr, &tr->tr_list_buf);
540 }
541 }
542 if (!list_empty(&le->le_list))
543 goto out;
544
545 set_bit(GLF_LFLUSH, &bd->bd_gl->gl_flags);
546 set_bit(GLF_DIRTY, &bd->bd_gl->gl_flags);
547 if (gfs2_is_jdata(ip)) {
548 gfs2_pin(sdp, bd->bd_bh);
549 tr->tr_num_databuf_new++;
550 sdp->sd_log_num_databuf++;
551 list_add_tail(&le->le_list, &sdp->sd_log_le_databuf);
552 } else {
553 list_add_tail(&le->le_list, &sdp->sd_log_le_ordered);
554 }
555out:
556 gfs2_log_unlock(sdp);
557 unlock_buffer(bd->bd_bh);
558}
559
560static void gfs2_check_magic(struct buffer_head *bh)
561{
562 void *kaddr;
563 __be32 *ptr;
564
565 clear_buffer_escaped(bh);
566 kaddr = kmap_atomic(bh->b_page, KM_USER0);
567 ptr = kaddr + bh_offset(bh);
568 if (*ptr == cpu_to_be32(GFS2_MAGIC))
569 set_buffer_escaped(bh);
570 kunmap_atomic(kaddr, KM_USER0);
571}
572
573static void gfs2_write_blocks(struct gfs2_sbd *sdp, struct buffer_head *bh,
574 struct list_head *list, struct list_head *done,
575 unsigned int n)
576{
577 struct buffer_head *bh1;
578 struct gfs2_log_descriptor *ld;
579 struct gfs2_bufdata *bd;
580 __be64 *ptr;
581
582 if (!bh)
583 return;
584
585 ld = bh_log_desc(bh);
586 ld->ld_length = cpu_to_be32(n + 1);
587 ld->ld_data1 = cpu_to_be32(n);
588
589 ptr = bh_log_ptr(bh);
590
591 get_bh(bh);
592 submit_bh(WRITE_SYNC, bh);
593 gfs2_log_lock(sdp);
594 while(!list_empty(list)) {
595 bd = list_entry(list->next, struct gfs2_bufdata, bd_le.le_list);
596 list_move_tail(&bd->bd_le.le_list, done);
597 get_bh(bd->bd_bh);
598 while (be64_to_cpu(*ptr) != bd->bd_bh->b_blocknr) {
599 gfs2_log_incr_head(sdp);
600 ptr += 2;
601 }
602 gfs2_log_unlock(sdp);
603 lock_buffer(bd->bd_bh);
604 if (buffer_escaped(bd->bd_bh)) {
605 void *kaddr;
606 bh1 = gfs2_log_get_buf(sdp);
607 kaddr = kmap_atomic(bd->bd_bh->b_page, KM_USER0);
608 memcpy(bh1->b_data, kaddr + bh_offset(bd->bd_bh),
609 bh1->b_size);
610 kunmap_atomic(kaddr, KM_USER0);
611 *(__be32 *)bh1->b_data = 0;
612 clear_buffer_escaped(bd->bd_bh);
613 unlock_buffer(bd->bd_bh);
614 brelse(bd->bd_bh);
615 } else {
616 bh1 = gfs2_log_fake_buf(sdp, bd->bd_bh);
617 }
618 submit_bh(WRITE_SYNC, bh1);
619 gfs2_log_lock(sdp);
620 ptr += 2;
621 }
622 gfs2_log_unlock(sdp);
623 brelse(bh);
624}
625
626/**
627 * databuf_lo_before_commit - Scan the data buffers, writing as we go
628 *
629 */
630
631static void databuf_lo_before_commit(struct gfs2_sbd *sdp)
632{
633 struct gfs2_bufdata *bd = NULL;
634 struct buffer_head *bh = NULL;
635 unsigned int n = 0;
636 __be64 *ptr = NULL, *end = NULL;
637 LIST_HEAD(processed);
638 LIST_HEAD(in_progress);
639
640 gfs2_log_lock(sdp);
641 while (!list_empty(&sdp->sd_log_le_databuf)) {
642 if (ptr == end) {
643 gfs2_log_unlock(sdp);
644 gfs2_write_blocks(sdp, bh, &in_progress, &processed, n);
645 n = 0;
646 bh = gfs2_get_log_desc(sdp, GFS2_LOG_DESC_JDATA);
647 ptr = bh_log_ptr(bh);
648 end = bh_ptr_end(bh) - 1;
649 gfs2_log_lock(sdp);
650 continue;
651 }
652 bd = list_entry(sdp->sd_log_le_databuf.next, struct gfs2_bufdata, bd_le.le_list);
653 list_move_tail(&bd->bd_le.le_list, &in_progress);
654 gfs2_check_magic(bd->bd_bh);
655 *ptr++ = cpu_to_be64(bd->bd_bh->b_blocknr);
656 *ptr++ = cpu_to_be64(buffer_escaped(bh) ? 1 : 0);
657 n++;
658 }
659 gfs2_log_unlock(sdp);
660 gfs2_write_blocks(sdp, bh, &in_progress, &processed, n);
661 gfs2_log_lock(sdp);
662 list_splice(&processed, &sdp->sd_log_le_databuf);
663 gfs2_log_unlock(sdp);
664}
665
666static int databuf_lo_scan_elements(struct gfs2_jdesc *jd, unsigned int start,
667 struct gfs2_log_descriptor *ld,
668 __be64 *ptr, int pass)
669{
670 struct gfs2_inode *ip = GFS2_I(jd->jd_inode);
671 struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode);
672 struct gfs2_glock *gl = ip->i_gl;
673 unsigned int blks = be32_to_cpu(ld->ld_data1);
674 struct buffer_head *bh_log, *bh_ip;
675 u64 blkno;
676 u64 esc;
677 int error = 0;
678
679 if (pass != 1 || be32_to_cpu(ld->ld_type) != GFS2_LOG_DESC_JDATA)
680 return 0;
681
682 gfs2_replay_incr_blk(sdp, &start);
683 for (; blks; gfs2_replay_incr_blk(sdp, &start), blks--) {
684 blkno = be64_to_cpu(*ptr++);
685 esc = be64_to_cpu(*ptr++);
686
687 sdp->sd_found_blocks++;
688
689 if (gfs2_revoke_check(sdp, blkno, start))
690 continue;
691
692 error = gfs2_replay_read_block(jd, start, &bh_log);
693 if (error)
694 return error;
695
696 bh_ip = gfs2_meta_new(gl, blkno);
697 memcpy(bh_ip->b_data, bh_log->b_data, bh_log->b_size);
698
699 /* Unescape */
700 if (esc) {
701 __be32 *eptr = (__be32 *)bh_ip->b_data;
702 *eptr = cpu_to_be32(GFS2_MAGIC);
703 }
704 mark_buffer_dirty(bh_ip);
705
706 brelse(bh_log);
707 brelse(bh_ip);
708 if (error)
709 break;
710
711 sdp->sd_replayed_blocks++;
712 }
713
714 return error;
715}
716
717/* FIXME: sort out accounting for log blocks etc. */
718
719static void databuf_lo_after_scan(struct gfs2_jdesc *jd, int error, int pass)
720{
721 struct gfs2_inode *ip = GFS2_I(jd->jd_inode);
722 struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode);
723
724 if (error) {
725 gfs2_meta_sync(ip->i_gl);
726 return;
727 }
728 if (pass != 1)
729 return;
730
731 /* data sync? */
732 gfs2_meta_sync(ip->i_gl);
733
734 fs_info(sdp, "jid=%u: Replayed %u of %u data blocks\n",
735 jd->jd_jid, sdp->sd_replayed_blocks, sdp->sd_found_blocks);
736}
737
738static void databuf_lo_after_commit(struct gfs2_sbd *sdp, struct gfs2_ail *ai)
739{
740 struct list_head *head = &sdp->sd_log_le_databuf;
741 struct gfs2_bufdata *bd;
742
743 while (!list_empty(head)) {
744 bd = list_entry(head->next, struct gfs2_bufdata, bd_le.le_list);
745 list_del_init(&bd->bd_le.le_list);
746 sdp->sd_log_num_databuf--;
747 gfs2_unpin(sdp, bd->bd_bh, ai);
748 }
749 gfs2_assert_warn(sdp, !sdp->sd_log_num_databuf);
750}
751
752
753const struct gfs2_log_operations gfs2_buf_lops = {
754 .lo_add = buf_lo_add,
755 .lo_before_commit = buf_lo_before_commit,
756 .lo_after_commit = buf_lo_after_commit,
757 .lo_before_scan = buf_lo_before_scan,
758 .lo_scan_elements = buf_lo_scan_elements,
759 .lo_after_scan = buf_lo_after_scan,
760 .lo_name = "buf",
761};
762
763const struct gfs2_log_operations gfs2_revoke_lops = {
764 .lo_add = revoke_lo_add,
765 .lo_before_commit = revoke_lo_before_commit,
766 .lo_after_commit = revoke_lo_after_commit,
767 .lo_before_scan = revoke_lo_before_scan,
768 .lo_scan_elements = revoke_lo_scan_elements,
769 .lo_after_scan = revoke_lo_after_scan,
770 .lo_name = "revoke",
771};
772
773const struct gfs2_log_operations gfs2_rg_lops = {
774 .lo_add = rg_lo_add,
775 .lo_after_commit = rg_lo_after_commit,
776 .lo_name = "rg",
777};
778
779const struct gfs2_log_operations gfs2_databuf_lops = {
780 .lo_add = databuf_lo_add,
781 .lo_before_commit = databuf_lo_before_commit,
782 .lo_after_commit = databuf_lo_after_commit,
783 .lo_scan_elements = databuf_lo_scan_elements,
784 .lo_after_scan = databuf_lo_after_scan,
785 .lo_name = "databuf",
786};
787
788const struct gfs2_log_operations *gfs2_log_ops[] = {
789 &gfs2_databuf_lops,
790 &gfs2_buf_lops,
791 &gfs2_rg_lops,
792 &gfs2_revoke_lops,
793 NULL,
794};
795
1/*
2 * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
3 * Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved.
4 *
5 * This copyrighted material is made available to anyone wishing to use,
6 * modify, copy, or redistribute it subject to the terms and conditions
7 * of the GNU General Public License version 2.
8 */
9
10#include <linux/sched.h>
11#include <linux/slab.h>
12#include <linux/spinlock.h>
13#include <linux/completion.h>
14#include <linux/buffer_head.h>
15#include <linux/mempool.h>
16#include <linux/gfs2_ondisk.h>
17#include <linux/bio.h>
18#include <linux/fs.h>
19#include <linux/list_sort.h>
20
21#include "gfs2.h"
22#include "incore.h"
23#include "inode.h"
24#include "glock.h"
25#include "log.h"
26#include "lops.h"
27#include "meta_io.h"
28#include "recovery.h"
29#include "rgrp.h"
30#include "trans.h"
31#include "util.h"
32#include "trace_gfs2.h"
33
34/**
35 * gfs2_pin - Pin a buffer in memory
36 * @sdp: The superblock
37 * @bh: The buffer to be pinned
38 *
39 * The log lock must be held when calling this function
40 */
41void gfs2_pin(struct gfs2_sbd *sdp, struct buffer_head *bh)
42{
43 struct gfs2_bufdata *bd;
44
45 BUG_ON(!current->journal_info);
46
47 clear_buffer_dirty(bh);
48 if (test_set_buffer_pinned(bh))
49 gfs2_assert_withdraw(sdp, 0);
50 if (!buffer_uptodate(bh))
51 gfs2_io_error_bh(sdp, bh);
52 bd = bh->b_private;
53 /* If this buffer is in the AIL and it has already been written
54 * to in-place disk block, remove it from the AIL.
55 */
56 spin_lock(&sdp->sd_ail_lock);
57 if (bd->bd_tr)
58 list_move(&bd->bd_ail_st_list, &bd->bd_tr->tr_ail2_list);
59 spin_unlock(&sdp->sd_ail_lock);
60 get_bh(bh);
61 atomic_inc(&sdp->sd_log_pinned);
62 trace_gfs2_pin(bd, 1);
63}
64
65static bool buffer_is_rgrp(const struct gfs2_bufdata *bd)
66{
67 return bd->bd_gl->gl_name.ln_type == LM_TYPE_RGRP;
68}
69
70static void maybe_release_space(struct gfs2_bufdata *bd)
71{
72 struct gfs2_glock *gl = bd->bd_gl;
73 struct gfs2_sbd *sdp = gl->gl_sbd;
74 struct gfs2_rgrpd *rgd = gl->gl_object;
75 unsigned int index = bd->bd_bh->b_blocknr - gl->gl_name.ln_number;
76 struct gfs2_bitmap *bi = rgd->rd_bits + index;
77
78 if (bi->bi_clone == 0)
79 return;
80 if (sdp->sd_args.ar_discard)
81 gfs2_rgrp_send_discards(sdp, rgd->rd_data0, bd->bd_bh, bi, 1, NULL);
82 memcpy(bi->bi_clone + bi->bi_offset,
83 bd->bd_bh->b_data + bi->bi_offset, bi->bi_len);
84 clear_bit(GBF_FULL, &bi->bi_flags);
85 rgd->rd_free_clone = rgd->rd_free;
86 rgd->rd_extfail_pt = rgd->rd_free;
87}
88
89/**
90 * gfs2_unpin - Unpin a buffer
91 * @sdp: the filesystem the buffer belongs to
92 * @bh: The buffer to unpin
93 * @ai:
94 * @flags: The inode dirty flags
95 *
96 */
97
98static void gfs2_unpin(struct gfs2_sbd *sdp, struct buffer_head *bh,
99 struct gfs2_trans *tr)
100{
101 struct gfs2_bufdata *bd = bh->b_private;
102
103 BUG_ON(!buffer_uptodate(bh));
104 BUG_ON(!buffer_pinned(bh));
105
106 lock_buffer(bh);
107 mark_buffer_dirty(bh);
108 clear_buffer_pinned(bh);
109
110 if (buffer_is_rgrp(bd))
111 maybe_release_space(bd);
112
113 spin_lock(&sdp->sd_ail_lock);
114 if (bd->bd_tr) {
115 list_del(&bd->bd_ail_st_list);
116 brelse(bh);
117 } else {
118 struct gfs2_glock *gl = bd->bd_gl;
119 list_add(&bd->bd_ail_gl_list, &gl->gl_ail_list);
120 atomic_inc(&gl->gl_ail_count);
121 }
122 bd->bd_tr = tr;
123 list_add(&bd->bd_ail_st_list, &tr->tr_ail1_list);
124 spin_unlock(&sdp->sd_ail_lock);
125
126 clear_bit(GLF_LFLUSH, &bd->bd_gl->gl_flags);
127 trace_gfs2_pin(bd, 0);
128 unlock_buffer(bh);
129 atomic_dec(&sdp->sd_log_pinned);
130}
131
132static void gfs2_log_incr_head(struct gfs2_sbd *sdp)
133{
134 BUG_ON((sdp->sd_log_flush_head == sdp->sd_log_tail) &&
135 (sdp->sd_log_flush_head != sdp->sd_log_head));
136
137 if (++sdp->sd_log_flush_head == sdp->sd_jdesc->jd_blocks) {
138 sdp->sd_log_flush_head = 0;
139 sdp->sd_log_flush_wrapped = 1;
140 }
141}
142
143static u64 gfs2_log_bmap(struct gfs2_sbd *sdp)
144{
145 unsigned int lbn = sdp->sd_log_flush_head;
146 struct gfs2_journal_extent *je;
147 u64 block;
148
149 list_for_each_entry(je, &sdp->sd_jdesc->extent_list, list) {
150 if ((lbn >= je->lblock) && (lbn < (je->lblock + je->blocks))) {
151 block = je->dblock + lbn - je->lblock;
152 gfs2_log_incr_head(sdp);
153 return block;
154 }
155 }
156
157 return -1;
158}
159
160/**
161 * gfs2_end_log_write_bh - end log write of pagecache data with buffers
162 * @sdp: The superblock
163 * @bvec: The bio_vec
164 * @error: The i/o status
165 *
166 * This finds the relavent buffers and unlocks then and sets the
167 * error flag according to the status of the i/o request. This is
168 * used when the log is writing data which has an in-place version
169 * that is pinned in the pagecache.
170 */
171
172static void gfs2_end_log_write_bh(struct gfs2_sbd *sdp, struct bio_vec *bvec,
173 int error)
174{
175 struct buffer_head *bh, *next;
176 struct page *page = bvec->bv_page;
177 unsigned size;
178
179 bh = page_buffers(page);
180 size = bvec->bv_len;
181 while (bh_offset(bh) < bvec->bv_offset)
182 bh = bh->b_this_page;
183 do {
184 if (error)
185 set_buffer_write_io_error(bh);
186 unlock_buffer(bh);
187 next = bh->b_this_page;
188 size -= bh->b_size;
189 brelse(bh);
190 bh = next;
191 } while(bh && size);
192}
193
194/**
195 * gfs2_end_log_write - end of i/o to the log
196 * @bio: The bio
197 * @error: Status of i/o request
198 *
199 * Each bio_vec contains either data from the pagecache or data
200 * relating to the log itself. Here we iterate over the bio_vec
201 * array, processing both kinds of data.
202 *
203 */
204
205static void gfs2_end_log_write(struct bio *bio, int error)
206{
207 struct gfs2_sbd *sdp = bio->bi_private;
208 struct bio_vec *bvec;
209 struct page *page;
210 int i;
211
212 if (error) {
213 sdp->sd_log_error = error;
214 fs_err(sdp, "Error %d writing to log\n", error);
215 }
216
217 bio_for_each_segment_all(bvec, bio, i) {
218 page = bvec->bv_page;
219 if (page_has_buffers(page))
220 gfs2_end_log_write_bh(sdp, bvec, error);
221 else
222 mempool_free(page, gfs2_page_pool);
223 }
224
225 bio_put(bio);
226 if (atomic_dec_and_test(&sdp->sd_log_in_flight))
227 wake_up(&sdp->sd_log_flush_wait);
228}
229
230/**
231 * gfs2_log_flush_bio - Submit any pending log bio
232 * @sdp: The superblock
233 * @rw: The rw flags
234 *
235 * Submit any pending part-built or full bio to the block device. If
236 * there is no pending bio, then this is a no-op.
237 */
238
239void gfs2_log_flush_bio(struct gfs2_sbd *sdp, int rw)
240{
241 if (sdp->sd_log_bio) {
242 atomic_inc(&sdp->sd_log_in_flight);
243 submit_bio(rw, sdp->sd_log_bio);
244 sdp->sd_log_bio = NULL;
245 }
246}
247
248/**
249 * gfs2_log_alloc_bio - Allocate a new bio for log writing
250 * @sdp: The superblock
251 * @blkno: The next device block number we want to write to
252 *
253 * This should never be called when there is a cached bio in the
254 * super block. When it returns, there will be a cached bio in the
255 * super block which will have as many bio_vecs as the device is
256 * happy to handle.
257 *
258 * Returns: Newly allocated bio
259 */
260
261static struct bio *gfs2_log_alloc_bio(struct gfs2_sbd *sdp, u64 blkno)
262{
263 struct super_block *sb = sdp->sd_vfs;
264 unsigned nrvecs = bio_get_nr_vecs(sb->s_bdev);
265 struct bio *bio;
266
267 BUG_ON(sdp->sd_log_bio);
268
269 while (1) {
270 bio = bio_alloc(GFP_NOIO, nrvecs);
271 if (likely(bio))
272 break;
273 nrvecs = max(nrvecs/2, 1U);
274 }
275
276 bio->bi_iter.bi_sector = blkno * (sb->s_blocksize >> 9);
277 bio->bi_bdev = sb->s_bdev;
278 bio->bi_end_io = gfs2_end_log_write;
279 bio->bi_private = sdp;
280
281 sdp->sd_log_bio = bio;
282
283 return bio;
284}
285
286/**
287 * gfs2_log_get_bio - Get cached log bio, or allocate a new one
288 * @sdp: The superblock
289 * @blkno: The device block number we want to write to
290 *
291 * If there is a cached bio, then if the next block number is sequential
292 * with the previous one, return it, otherwise flush the bio to the
293 * device. If there is not a cached bio, or we just flushed it, then
294 * allocate a new one.
295 *
296 * Returns: The bio to use for log writes
297 */
298
299static struct bio *gfs2_log_get_bio(struct gfs2_sbd *sdp, u64 blkno)
300{
301 struct bio *bio = sdp->sd_log_bio;
302 u64 nblk;
303
304 if (bio) {
305 nblk = bio_end_sector(bio);
306 nblk >>= sdp->sd_fsb2bb_shift;
307 if (blkno == nblk)
308 return bio;
309 gfs2_log_flush_bio(sdp, WRITE);
310 }
311
312 return gfs2_log_alloc_bio(sdp, blkno);
313}
314
315
316/**
317 * gfs2_log_write - write to log
318 * @sdp: the filesystem
319 * @page: the page to write
320 * @size: the size of the data to write
321 * @offset: the offset within the page
322 *
323 * Try and add the page segment to the current bio. If that fails,
324 * submit the current bio to the device and create a new one, and
325 * then add the page segment to that.
326 */
327
328static void gfs2_log_write(struct gfs2_sbd *sdp, struct page *page,
329 unsigned size, unsigned offset)
330{
331 u64 blkno = gfs2_log_bmap(sdp);
332 struct bio *bio;
333 int ret;
334
335 bio = gfs2_log_get_bio(sdp, blkno);
336 ret = bio_add_page(bio, page, size, offset);
337 if (ret == 0) {
338 gfs2_log_flush_bio(sdp, WRITE);
339 bio = gfs2_log_alloc_bio(sdp, blkno);
340 ret = bio_add_page(bio, page, size, offset);
341 WARN_ON(ret == 0);
342 }
343}
344
345/**
346 * gfs2_log_write_bh - write a buffer's content to the log
347 * @sdp: The super block
348 * @bh: The buffer pointing to the in-place location
349 *
350 * This writes the content of the buffer to the next available location
351 * in the log. The buffer will be unlocked once the i/o to the log has
352 * completed.
353 */
354
355static void gfs2_log_write_bh(struct gfs2_sbd *sdp, struct buffer_head *bh)
356{
357 gfs2_log_write(sdp, bh->b_page, bh->b_size, bh_offset(bh));
358}
359
360/**
361 * gfs2_log_write_page - write one block stored in a page, into the log
362 * @sdp: The superblock
363 * @page: The struct page
364 *
365 * This writes the first block-sized part of the page into the log. Note
366 * that the page must have been allocated from the gfs2_page_pool mempool
367 * and that after this has been called, ownership has been transferred and
368 * the page may be freed at any time.
369 */
370
371void gfs2_log_write_page(struct gfs2_sbd *sdp, struct page *page)
372{
373 struct super_block *sb = sdp->sd_vfs;
374 gfs2_log_write(sdp, page, sb->s_blocksize, 0);
375}
376
377static struct page *gfs2_get_log_desc(struct gfs2_sbd *sdp, u32 ld_type,
378 u32 ld_length, u32 ld_data1)
379{
380 struct page *page = mempool_alloc(gfs2_page_pool, GFP_NOIO);
381 struct gfs2_log_descriptor *ld = page_address(page);
382 clear_page(ld);
383 ld->ld_header.mh_magic = cpu_to_be32(GFS2_MAGIC);
384 ld->ld_header.mh_type = cpu_to_be32(GFS2_METATYPE_LD);
385 ld->ld_header.mh_format = cpu_to_be32(GFS2_FORMAT_LD);
386 ld->ld_type = cpu_to_be32(ld_type);
387 ld->ld_length = cpu_to_be32(ld_length);
388 ld->ld_data1 = cpu_to_be32(ld_data1);
389 ld->ld_data2 = 0;
390 return page;
391}
392
393static void gfs2_check_magic(struct buffer_head *bh)
394{
395 void *kaddr;
396 __be32 *ptr;
397
398 clear_buffer_escaped(bh);
399 kaddr = kmap_atomic(bh->b_page);
400 ptr = kaddr + bh_offset(bh);
401 if (*ptr == cpu_to_be32(GFS2_MAGIC))
402 set_buffer_escaped(bh);
403 kunmap_atomic(kaddr);
404}
405
406static int blocknr_cmp(void *priv, struct list_head *a, struct list_head *b)
407{
408 struct gfs2_bufdata *bda, *bdb;
409
410 bda = list_entry(a, struct gfs2_bufdata, bd_list);
411 bdb = list_entry(b, struct gfs2_bufdata, bd_list);
412
413 if (bda->bd_bh->b_blocknr < bdb->bd_bh->b_blocknr)
414 return -1;
415 if (bda->bd_bh->b_blocknr > bdb->bd_bh->b_blocknr)
416 return 1;
417 return 0;
418}
419
420static void gfs2_before_commit(struct gfs2_sbd *sdp, unsigned int limit,
421 unsigned int total, struct list_head *blist,
422 bool is_databuf)
423{
424 struct gfs2_log_descriptor *ld;
425 struct gfs2_bufdata *bd1 = NULL, *bd2;
426 struct page *page;
427 unsigned int num;
428 unsigned n;
429 __be64 *ptr;
430
431 gfs2_log_lock(sdp);
432 list_sort(NULL, blist, blocknr_cmp);
433 bd1 = bd2 = list_prepare_entry(bd1, blist, bd_list);
434 while(total) {
435 num = total;
436 if (total > limit)
437 num = limit;
438 gfs2_log_unlock(sdp);
439 page = gfs2_get_log_desc(sdp,
440 is_databuf ? GFS2_LOG_DESC_JDATA :
441 GFS2_LOG_DESC_METADATA, num + 1, num);
442 ld = page_address(page);
443 gfs2_log_lock(sdp);
444 ptr = (__be64 *)(ld + 1);
445
446 n = 0;
447 list_for_each_entry_continue(bd1, blist, bd_list) {
448 *ptr++ = cpu_to_be64(bd1->bd_bh->b_blocknr);
449 if (is_databuf) {
450 gfs2_check_magic(bd1->bd_bh);
451 *ptr++ = cpu_to_be64(buffer_escaped(bd1->bd_bh) ? 1 : 0);
452 }
453 if (++n >= num)
454 break;
455 }
456
457 gfs2_log_unlock(sdp);
458 gfs2_log_write_page(sdp, page);
459 gfs2_log_lock(sdp);
460
461 n = 0;
462 list_for_each_entry_continue(bd2, blist, bd_list) {
463 get_bh(bd2->bd_bh);
464 gfs2_log_unlock(sdp);
465 lock_buffer(bd2->bd_bh);
466
467 if (buffer_escaped(bd2->bd_bh)) {
468 void *kaddr;
469 page = mempool_alloc(gfs2_page_pool, GFP_NOIO);
470 ptr = page_address(page);
471 kaddr = kmap_atomic(bd2->bd_bh->b_page);
472 memcpy(ptr, kaddr + bh_offset(bd2->bd_bh),
473 bd2->bd_bh->b_size);
474 kunmap_atomic(kaddr);
475 *(__be32 *)ptr = 0;
476 clear_buffer_escaped(bd2->bd_bh);
477 unlock_buffer(bd2->bd_bh);
478 brelse(bd2->bd_bh);
479 gfs2_log_write_page(sdp, page);
480 } else {
481 gfs2_log_write_bh(sdp, bd2->bd_bh);
482 }
483 gfs2_log_lock(sdp);
484 if (++n >= num)
485 break;
486 }
487
488 BUG_ON(total < num);
489 total -= num;
490 }
491 gfs2_log_unlock(sdp);
492}
493
494static void buf_lo_before_commit(struct gfs2_sbd *sdp, struct gfs2_trans *tr)
495{
496 unsigned int limit = buf_limit(sdp); /* 503 for 4k blocks */
497 unsigned int nbuf;
498 if (tr == NULL)
499 return;
500 nbuf = tr->tr_num_buf_new - tr->tr_num_buf_rm;
501 gfs2_before_commit(sdp, limit, nbuf, &tr->tr_buf, 0);
502}
503
504static void buf_lo_after_commit(struct gfs2_sbd *sdp, struct gfs2_trans *tr)
505{
506 struct list_head *head;
507 struct gfs2_bufdata *bd;
508
509 if (tr == NULL)
510 return;
511
512 head = &tr->tr_buf;
513 while (!list_empty(head)) {
514 bd = list_entry(head->next, struct gfs2_bufdata, bd_list);
515 list_del_init(&bd->bd_list);
516 gfs2_unpin(sdp, bd->bd_bh, tr);
517 }
518}
519
520static void buf_lo_before_scan(struct gfs2_jdesc *jd,
521 struct gfs2_log_header_host *head, int pass)
522{
523 if (pass != 0)
524 return;
525
526 jd->jd_found_blocks = 0;
527 jd->jd_replayed_blocks = 0;
528}
529
530static int buf_lo_scan_elements(struct gfs2_jdesc *jd, unsigned int start,
531 struct gfs2_log_descriptor *ld, __be64 *ptr,
532 int pass)
533{
534 struct gfs2_inode *ip = GFS2_I(jd->jd_inode);
535 struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode);
536 struct gfs2_glock *gl = ip->i_gl;
537 unsigned int blks = be32_to_cpu(ld->ld_data1);
538 struct buffer_head *bh_log, *bh_ip;
539 u64 blkno;
540 int error = 0;
541
542 if (pass != 1 || be32_to_cpu(ld->ld_type) != GFS2_LOG_DESC_METADATA)
543 return 0;
544
545 gfs2_replay_incr_blk(sdp, &start);
546
547 for (; blks; gfs2_replay_incr_blk(sdp, &start), blks--) {
548 blkno = be64_to_cpu(*ptr++);
549
550 jd->jd_found_blocks++;
551
552 if (gfs2_revoke_check(jd, blkno, start))
553 continue;
554
555 error = gfs2_replay_read_block(jd, start, &bh_log);
556 if (error)
557 return error;
558
559 bh_ip = gfs2_meta_new(gl, blkno);
560 memcpy(bh_ip->b_data, bh_log->b_data, bh_log->b_size);
561
562 if (gfs2_meta_check(sdp, bh_ip))
563 error = -EIO;
564 else
565 mark_buffer_dirty(bh_ip);
566
567 brelse(bh_log);
568 brelse(bh_ip);
569
570 if (error)
571 break;
572
573 jd->jd_replayed_blocks++;
574 }
575
576 return error;
577}
578
579/**
580 * gfs2_meta_sync - Sync all buffers associated with a glock
581 * @gl: The glock
582 *
583 */
584
585static void gfs2_meta_sync(struct gfs2_glock *gl)
586{
587 struct address_space *mapping = gfs2_glock2aspace(gl);
588 struct gfs2_sbd *sdp = gl->gl_sbd;
589 int error;
590
591 if (mapping == NULL)
592 mapping = &sdp->sd_aspace;
593
594 filemap_fdatawrite(mapping);
595 error = filemap_fdatawait(mapping);
596
597 if (error)
598 gfs2_io_error(gl->gl_sbd);
599}
600
601static void buf_lo_after_scan(struct gfs2_jdesc *jd, int error, int pass)
602{
603 struct gfs2_inode *ip = GFS2_I(jd->jd_inode);
604 struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode);
605
606 if (error) {
607 gfs2_meta_sync(ip->i_gl);
608 return;
609 }
610 if (pass != 1)
611 return;
612
613 gfs2_meta_sync(ip->i_gl);
614
615 fs_info(sdp, "jid=%u: Replayed %u of %u blocks\n",
616 jd->jd_jid, jd->jd_replayed_blocks, jd->jd_found_blocks);
617}
618
619static void revoke_lo_before_commit(struct gfs2_sbd *sdp, struct gfs2_trans *tr)
620{
621 struct gfs2_meta_header *mh;
622 unsigned int offset;
623 struct list_head *head = &sdp->sd_log_le_revoke;
624 struct gfs2_bufdata *bd;
625 struct page *page;
626 unsigned int length;
627
628 gfs2_write_revokes(sdp);
629 if (!sdp->sd_log_num_revoke)
630 return;
631
632 length = gfs2_struct2blk(sdp, sdp->sd_log_num_revoke, sizeof(u64));
633 page = gfs2_get_log_desc(sdp, GFS2_LOG_DESC_REVOKE, length, sdp->sd_log_num_revoke);
634 offset = sizeof(struct gfs2_log_descriptor);
635
636 list_for_each_entry(bd, head, bd_list) {
637 sdp->sd_log_num_revoke--;
638
639 if (offset + sizeof(u64) > sdp->sd_sb.sb_bsize) {
640
641 gfs2_log_write_page(sdp, page);
642 page = mempool_alloc(gfs2_page_pool, GFP_NOIO);
643 mh = page_address(page);
644 clear_page(mh);
645 mh->mh_magic = cpu_to_be32(GFS2_MAGIC);
646 mh->mh_type = cpu_to_be32(GFS2_METATYPE_LB);
647 mh->mh_format = cpu_to_be32(GFS2_FORMAT_LB);
648 offset = sizeof(struct gfs2_meta_header);
649 }
650
651 *(__be64 *)(page_address(page) + offset) = cpu_to_be64(bd->bd_blkno);
652 offset += sizeof(u64);
653 }
654 gfs2_assert_withdraw(sdp, !sdp->sd_log_num_revoke);
655
656 gfs2_log_write_page(sdp, page);
657}
658
659static void revoke_lo_after_commit(struct gfs2_sbd *sdp, struct gfs2_trans *tr)
660{
661 struct list_head *head = &sdp->sd_log_le_revoke;
662 struct gfs2_bufdata *bd;
663 struct gfs2_glock *gl;
664
665 while (!list_empty(head)) {
666 bd = list_entry(head->next, struct gfs2_bufdata, bd_list);
667 list_del_init(&bd->bd_list);
668 gl = bd->bd_gl;
669 atomic_dec(&gl->gl_revokes);
670 clear_bit(GLF_LFLUSH, &gl->gl_flags);
671 kmem_cache_free(gfs2_bufdata_cachep, bd);
672 }
673}
674
675static void revoke_lo_before_scan(struct gfs2_jdesc *jd,
676 struct gfs2_log_header_host *head, int pass)
677{
678 if (pass != 0)
679 return;
680
681 jd->jd_found_revokes = 0;
682 jd->jd_replay_tail = head->lh_tail;
683}
684
685static int revoke_lo_scan_elements(struct gfs2_jdesc *jd, unsigned int start,
686 struct gfs2_log_descriptor *ld, __be64 *ptr,
687 int pass)
688{
689 struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode);
690 unsigned int blks = be32_to_cpu(ld->ld_length);
691 unsigned int revokes = be32_to_cpu(ld->ld_data1);
692 struct buffer_head *bh;
693 unsigned int offset;
694 u64 blkno;
695 int first = 1;
696 int error;
697
698 if (pass != 0 || be32_to_cpu(ld->ld_type) != GFS2_LOG_DESC_REVOKE)
699 return 0;
700
701 offset = sizeof(struct gfs2_log_descriptor);
702
703 for (; blks; gfs2_replay_incr_blk(sdp, &start), blks--) {
704 error = gfs2_replay_read_block(jd, start, &bh);
705 if (error)
706 return error;
707
708 if (!first)
709 gfs2_metatype_check(sdp, bh, GFS2_METATYPE_LB);
710
711 while (offset + sizeof(u64) <= sdp->sd_sb.sb_bsize) {
712 blkno = be64_to_cpu(*(__be64 *)(bh->b_data + offset));
713
714 error = gfs2_revoke_add(jd, blkno, start);
715 if (error < 0) {
716 brelse(bh);
717 return error;
718 }
719 else if (error)
720 jd->jd_found_revokes++;
721
722 if (!--revokes)
723 break;
724 offset += sizeof(u64);
725 }
726
727 brelse(bh);
728 offset = sizeof(struct gfs2_meta_header);
729 first = 0;
730 }
731
732 return 0;
733}
734
735static void revoke_lo_after_scan(struct gfs2_jdesc *jd, int error, int pass)
736{
737 struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode);
738
739 if (error) {
740 gfs2_revoke_clean(jd);
741 return;
742 }
743 if (pass != 1)
744 return;
745
746 fs_info(sdp, "jid=%u: Found %u revoke tags\n",
747 jd->jd_jid, jd->jd_found_revokes);
748
749 gfs2_revoke_clean(jd);
750}
751
752/**
753 * databuf_lo_before_commit - Scan the data buffers, writing as we go
754 *
755 */
756
757static void databuf_lo_before_commit(struct gfs2_sbd *sdp, struct gfs2_trans *tr)
758{
759 unsigned int limit = databuf_limit(sdp);
760 unsigned int nbuf;
761 if (tr == NULL)
762 return;
763 nbuf = tr->tr_num_databuf_new - tr->tr_num_databuf_rm;
764 gfs2_before_commit(sdp, limit, nbuf, &tr->tr_databuf, 1);
765}
766
767static int databuf_lo_scan_elements(struct gfs2_jdesc *jd, unsigned int start,
768 struct gfs2_log_descriptor *ld,
769 __be64 *ptr, int pass)
770{
771 struct gfs2_inode *ip = GFS2_I(jd->jd_inode);
772 struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode);
773 struct gfs2_glock *gl = ip->i_gl;
774 unsigned int blks = be32_to_cpu(ld->ld_data1);
775 struct buffer_head *bh_log, *bh_ip;
776 u64 blkno;
777 u64 esc;
778 int error = 0;
779
780 if (pass != 1 || be32_to_cpu(ld->ld_type) != GFS2_LOG_DESC_JDATA)
781 return 0;
782
783 gfs2_replay_incr_blk(sdp, &start);
784 for (; blks; gfs2_replay_incr_blk(sdp, &start), blks--) {
785 blkno = be64_to_cpu(*ptr++);
786 esc = be64_to_cpu(*ptr++);
787
788 jd->jd_found_blocks++;
789
790 if (gfs2_revoke_check(jd, blkno, start))
791 continue;
792
793 error = gfs2_replay_read_block(jd, start, &bh_log);
794 if (error)
795 return error;
796
797 bh_ip = gfs2_meta_new(gl, blkno);
798 memcpy(bh_ip->b_data, bh_log->b_data, bh_log->b_size);
799
800 /* Unescape */
801 if (esc) {
802 __be32 *eptr = (__be32 *)bh_ip->b_data;
803 *eptr = cpu_to_be32(GFS2_MAGIC);
804 }
805 mark_buffer_dirty(bh_ip);
806
807 brelse(bh_log);
808 brelse(bh_ip);
809
810 jd->jd_replayed_blocks++;
811 }
812
813 return error;
814}
815
816/* FIXME: sort out accounting for log blocks etc. */
817
818static void databuf_lo_after_scan(struct gfs2_jdesc *jd, int error, int pass)
819{
820 struct gfs2_inode *ip = GFS2_I(jd->jd_inode);
821 struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode);
822
823 if (error) {
824 gfs2_meta_sync(ip->i_gl);
825 return;
826 }
827 if (pass != 1)
828 return;
829
830 /* data sync? */
831 gfs2_meta_sync(ip->i_gl);
832
833 fs_info(sdp, "jid=%u: Replayed %u of %u data blocks\n",
834 jd->jd_jid, jd->jd_replayed_blocks, jd->jd_found_blocks);
835}
836
837static void databuf_lo_after_commit(struct gfs2_sbd *sdp, struct gfs2_trans *tr)
838{
839 struct list_head *head;
840 struct gfs2_bufdata *bd;
841
842 if (tr == NULL)
843 return;
844
845 head = &tr->tr_databuf;
846 while (!list_empty(head)) {
847 bd = list_entry(head->next, struct gfs2_bufdata, bd_list);
848 list_del_init(&bd->bd_list);
849 gfs2_unpin(sdp, bd->bd_bh, tr);
850 }
851}
852
853
854const struct gfs2_log_operations gfs2_buf_lops = {
855 .lo_before_commit = buf_lo_before_commit,
856 .lo_after_commit = buf_lo_after_commit,
857 .lo_before_scan = buf_lo_before_scan,
858 .lo_scan_elements = buf_lo_scan_elements,
859 .lo_after_scan = buf_lo_after_scan,
860 .lo_name = "buf",
861};
862
863const struct gfs2_log_operations gfs2_revoke_lops = {
864 .lo_before_commit = revoke_lo_before_commit,
865 .lo_after_commit = revoke_lo_after_commit,
866 .lo_before_scan = revoke_lo_before_scan,
867 .lo_scan_elements = revoke_lo_scan_elements,
868 .lo_after_scan = revoke_lo_after_scan,
869 .lo_name = "revoke",
870};
871
872const struct gfs2_log_operations gfs2_databuf_lops = {
873 .lo_before_commit = databuf_lo_before_commit,
874 .lo_after_commit = databuf_lo_after_commit,
875 .lo_scan_elements = databuf_lo_scan_elements,
876 .lo_after_scan = databuf_lo_after_scan,
877 .lo_name = "databuf",
878};
879
880const struct gfs2_log_operations *gfs2_log_ops[] = {
881 &gfs2_databuf_lops,
882 &gfs2_buf_lops,
883 &gfs2_revoke_lops,
884 NULL,
885};
886